OMPHOBBY M4 Helicopter Servo Arm Set OSHM4052 Sale! from 414 /per Qty. Add to Cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. This is a replacement servo arm set for the OMPHOBBY M4 Helicopters Contents Servo Arm Set-6 Qty available:5 SKU:OSHM4052